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SAE-AISI 4150 Steel vs. ASTM A285 Carbon Steel

Both SAE-AISI 4150 steel and ASTM A285 carbon steel are iron alloys.

For each property being compared, the top bar is SAE-AISI 4150 steel and the bottom bar is ASTM A285 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 380
110 to 130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 20
30 to 34
Fatigue Strength, MPa 260 to 780
150 to 180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 410 to 800
250 to 290
Tensile Strength: Ultimate (UTS), MPa 660 to 1310
380 to 450
Tensile Strength: Yield (Proof), MPa 380 to 1220
190 to 230

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
400
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420 to 1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 42
53
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 51
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 180
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 3930
94 to 150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 47
13 to 16
Strength to Weight: Bending, points 22 to 34
15 to 17
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 19 to 39
12 to 14